The Metal Slime King!
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In front of us a final boss already showed up! Well, it came from the third floor, and calculating based in my auto mapping, I can tell this dungeon has at least ten more floors. So it is probably fair to call this Metal Slime King has a "Mini Boss" although it is enormous and powerful. Lucifer, Partner, and Emeraldine looked at the creature emerge when the last few slimes died as their eyes sunk into their skulls. It was just that terrible! The thing was emanating a strong aura of intimidation as well, and it was as clear as water that this thing was controlling all the Slime Swarm we had been fighting so far!